4340405 has 4 divisors (see below), whose sum is σ = 5208492. Its totient is φ = 3472320.

The previous prime is 4340381. The next prime is 4340407. The reversal of 4340405 is 5040434.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2430481 + 1909924 = 1559^2 + 1382^2 .

It is a de Polignac number, because none of the positive numbers 2^k-4340405 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4340407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 434036 + ... + 434045.

It is an arithmetic number, because the mean of its divisors is an integer number (1302123).

Almost surely, 2^4340405 is an apocalyptic number.

It is an amenable number.

4340405 is a deficient number, since it is larger than the sum of its proper divisors (868087).

4340405 is an equidigital number, since it uses as much as digits as its factorization.

4340405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868086.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 4340405 is about 2083.3638664429. The cubic root of 4340405 is about 163.1210788192.

Adding to 4340405 its reverse (5040434), we get a palindrome (9380839).

The spelling of 4340405 in words is "four million, three hundred forty thousand, four hundred five".